How to Fill Out and File Form I-129 for a TN Visa

To file Form I-129 for a TN visa, a U.S. employer submits the current edition of the Petition for a Nonimmigrant Worker together with the Trade-NAFTA supplement, a detailed employer support letter, proof the Canadian or Mexican professional’s job fits a USMCA-listed profession, evidence of the required credentials, and the filing fees, sending the packet online or to the USCIS lockbox that covers the employer’s state. Approval lets the worker begin or continue TN employment for up to three years, with three-year extensions available and no cap on renewals.

When You Actually Need To File Form I-129

Not every TN case goes through USCIS. A Canadian citizen outside the United States can walk up to a port of entry or pre-clearance station, present credentials to a CBP officer, and be admitted in TN-1 status without any I-129 on file. An employer can still choose to file first, but for a Canadian’s initial admission it is optional.¹

Mexican citizens abroad go through a U.S. embassy or consulate in Mexico to obtain a TN visa stamp before entering, rather than through Form I-129.¹

Where I-129 is the required path is for anyone, Canadian or Mexican, who is already inside the United States and needs to extend TN status or change to TN from another nonimmigrant classification.² The classification is TN-1 for Canadians and TN-2 for Mexicans.

Confirm the Job Fits a USMCA Profession First

TN status only covers occupations on the list in Appendix 2 to Annex 16-A of the USMCA. About 60 professions are eligible, from accountants and engineers to scientists, pharmacists, and disaster-relief insurance claims adjusters. Each one carries its own minimum credential, most often a bachelor’s degree in a related field, sometimes a professional license, occasionally a combination of a diploma and years of experience.³

A few illustrations of how the credentials work: an accountant qualifies with a bachelor’s degree or a CPA, CA, CGA, or CMA designation. An engineer qualifies with a bachelor’s degree or a state or provincial license. A computer systems analyst can qualify with a bachelor’s degree, or a post-secondary diploma plus three years of experience. A management consultant needs a bachelor’s, or a professional credential showing five years of consulting experience, or five years of experience in a related specialty.

If the position does not match a listed profession, or the worker does not hold the credential that profession demands, TN is unavailable and a different visa category has to be used. This is the first thing to settle, because everything else in the petition builds on it.

Documents To Gather Before Filling Out the Form

Missing documents are one of the most common reasons TN petitions stall or get denied. Assemble the packet before opening the form.

From the Employer

The petitioning company needs its Federal Employer Identification Number, its principal U.S. office address, and the NAICS code for the business. The centerpiece is the employer support letter. Under 8 CFR 214.6, the letter has to describe the professional activity the worker will perform, the purpose of entry, the anticipated length of stay, and the compensation. It should also explain why the position calls for someone in a USMCA-listed profession and name that profession specifically.³

From the Beneficiary

Proof of Canadian or Mexican citizenship, typically a valid passport or birth certificate. Copies of degrees, diplomas, or certificates matching the profession’s minimum credential. If the degree was earned outside North America, a formal credential evaluation showing equivalency to a U.S. bachelor’s helps.

If the state where the work will be performed requires a license for that occupation, such as nursing, engineering, or accounting, include evidence of the license.⁴ Add a resume that shows relevant work history.

If the beneficiary is already in the United States, include copies of the current I-94 arrival record and any prior USCIS approval notices to establish current status and lawful presence.

Healthcare Workers: VisaScreen Certificate

Clinical healthcare workers face an extra requirement. Under 8 CFR 212.15, a foreign national coming to perform labor in a covered healthcare occupation is inadmissible without a certificate from an approved credentialing organization.⁵ The TN-eligible occupations affected include registered nurses, licensed practical nurses, physical therapists, occupational therapists, speech-language pathologists, audiologists, medical technologists, medical technicians, and physician assistants. Physicians are exempt.

The VisaScreen certificate verifies that education and training are comparable to U.S. standards, that all licenses are unencumbered, and that English proficiency requirements are met. CGFNS is authorized to issue certificates for all covered occupations, and some professions have their own specialty bodies. The process can take months, so healthcare beneficiaries should start well before the I-129 filing.

Filling Out Form I-129 and the TN Supplement

Download the current edition of Form I-129 from the USCIS website. The edition dated 02/27/26 was released in February 2026, and beginning April 1, 2026, USCIS will reject any I-129 filed on an older version.²

Working Through Parts 1 to 5

Part 1 collects the petitioner’s legal name, mailing address, and Federal Employer Identification Number. Part 2 specifies the action being requested, whether new employment, extension of stay, or change of status, and identifies the classification as TN-1 for a Canadian or TN-2 for a Mexican. Part 3 asks for the beneficiary’s full name, date of birth, country of citizenship, current U.S. address, and Social Security number if one has been issued. Part 4 identifies the U.S. consulate where the beneficiary would apply for a visa if outside the country. Part 5 covers the proposed employment, including the worksite address and the employer’s NAICS code.

The Trade-NAFTA Supplement

The TN supplement inside the I-129 packet asks for the specific USMCA profession, a concise description of the duties, and any prior periods of TN status the beneficiary has held. It exists so USCIS can verify that the role fits a treaty profession and that the beneficiary has not been in TN status indefinitely without a genuine temporary intent.

Mistakes That Cause Delays

Cross-check every entry against the support letter and the supporting documents. If the letter describes the role as “Management Consultant” but the supplement lists “Economist,” the mismatch invites a denial. Fill every mandatory field or mark it “N/A.” Blank fields can trigger a Request for Evidence. An unsigned form is rejected outright, with no chance to fix it without refiling.

Fees and How To Pay

The base filing fee is $1,015 for most employers, or $510 for small employers and nonprofits. USCIS defines a small employer as a firm with 25 or fewer full-time equivalent employees, counting affiliates and subsidiaries.⁶ Most petitioners also owe the Asylum Program Fee: $600 for larger employers, $300 for small employers, waived for nonprofits.¹

For paper filings, USCIS no longer accepts personal or business checks, money orders, or cashier’s checks unless an exemption applies. Pay by Form G-1450 (credit, debit, or prepaid card issued by a U.S. bank) or Form G-1650 (ACH transfer from a U.S. bank account). Petitioners without access to electronic payment can request an exemption on Form G-1651, but only four narrow criteria qualify.⁷

Where To File, and Premium Processing

Form I-129 for TN can be filed online through a USCIS account or by mail.² For paper filings, the correct lockbox depends on the petitioner’s primary office state and whether premium processing is requested. USCIS runs four regional lockboxes: Dallas, Phoenix, Chicago, and Carol Stream (Elgin), Illinois, and each covers a different set of states. Check the direct filing addresses page for I-129 before mailing.⁸ The wrong lockbox can mean rejection and returned fees.

Employers who need a faster decision can file Form I-907 alongside the petition. As of March 1, 2026, the premium processing fee for I-129 TN petitions is $2,965.⁹ Premium processing guarantees USCIS action within 15 business days, meaning an approval, denial, Request for Evidence, or notice of intent to deny.¹⁰ If USCIS issues an RFE, the 15-day clock restarts once the employer responds.

What Happens After You File

Receipt and Tracking

Once USCIS accepts the petition, it mails Form I-797C, Notice of Action, carrying a 13-character receipt number.¹¹ Use that number on the USCIS Case Status Online portal to follow the case.¹²

Processing Times

Without premium processing, median I-129 processing has been running about four to five months, based on USCIS fiscal year 2026 data through February 2026.¹³ Premium-filed petitions showed a median of about two weeks. Times shift with USCIS workload, so check the processing times page before filing.

The 240-Day Rule for Extensions

If the employer files a timely extension petition, meaning USCIS receives it with proper fees before the current TN status expires, the professional can keep working for the same employer for up to 240 days beyond the status expiration date while the petition is pending. The petition does not need to be approved for this continued work authorization to apply. The timely filing alone triggers it, and the 240-day count starts the day after the current status end date.

Traveling While the Petition Is Pending

Leaving the United States while an I-129 change-of-status request is pending can be treated as abandonment of that request. USCIS may still approve the underlying petition, but the status change portion could be denied, forcing the worker to apply for a visa at a consulate abroad and re-enter. For extension petitions, travel is less risky if the worker holds a valid visa and re-enters in the same classification, but the timing is delicate and documentation matters. The safest course is not to travel until the petition is decided.

If the Petition Is Denied

A denial notice states the specific legal grounds. Common ones include a job description that does not match a listed USMCA profession, credentials that fall short of the profession’s minimum, or inconsistencies between the form and the support letter. There is no formal appeal of an I-129 denial. The employer can file a motion to reopen or reconsider, or file a new corrected petition.

Adding a Spouse or Children on the Same Petition

A TN professional’s spouse and unmarried children under 21 can hold TD nonimmigrant status. Canadian family members can apply for TD at a port of entry; Mexican family members need a TD visa stamp from a U.S. consulate.

For dependents already in the United States, the request goes through the TN worker’s Form I-129 petition, not a separate Form I-539. USCIS explicitly prohibits TN-1 and TN-2 nonimmigrants and their dependents from using Form I-539 to request an extension or change of status.¹⁴ Filing on the wrong form can lead to rejection without a fee refund.

TD status does not include work authorization. A TD spouse or child who wants to work would need an independent work visa or employment authorization. TD dependents can study in the United States without additional permission.

1
U.S. Citizenship and Immigration Services. TN USMCA Professionals
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U.S. Citizenship and Immigration Services. Petition for a Nonimmigrant Worker
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eCFR. 8 CFR 214.6 – Citizens of Canada or Mexico Seeking Temporary Entry Under USMCA
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U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 2 Part P Chapter 3 – Documentation and Evidence
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eCFR. 8 CFR 212.15 – Certificates for Foreign Health Care Workers
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U.S. Citizenship and Immigration Services. Fee Schedule and Changes to Certain Other Immigration Benefit Request Requirements Small Entity Compliance Guide
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U.S. Citizenship and Immigration Services. Filing Fees
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U.S. Citizenship and Immigration Services. Direct Filing Addresses for Form I-129, Petition for a Nonimmigrant Worker
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U.S. Citizenship and Immigration Services. USCIS to Increase Premium Processing Fees
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U.S. Citizenship and Immigration Services. How Do I Request Premium Processing?
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U.S. Citizenship and Immigration Services. Form I-797C, Notice of Action
12
U.S. Citizenship and Immigration Services. Case Status Online
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U.S. Citizenship and Immigration Services. Historic Processing Times
14
U.S. Citizenship and Immigration Services. I-539, Application to Extend/Change Nonimmigrant Status